正則表達式Pattern類的基本用法

public void mailRegex() { // 要驗證的字符串 String str = "[e-mail]"; // 郵箱驗證規則 String regEx = "[a-zA-Z_]{1,}[a-zA-Z.]{0,}@(([a-zA-z0-9]-*){1,}\\.){1,3}[a-zA-z\\-]{1,}"; // 編譯正則表達式 Pattern pattern = Pattern.compile(regEx); // 忽略大小寫的寫法 // Pattern pat = Pattern.compile(regEx, Pattern.CASE_INSENSITIVE); Matcher matcher = pattern.matcher(str); // 字符串是否與正則表達式相匹配 boolean rs = matcher.matches(); // 字符串是否與正則表達式相匹配 boolean rs = matcher.matches(); boolean look = matcher.lookingAt(); boolean find = matcher.find(2);//修改start的值，改變取結果集。 int start = matcher.start(); int end = matcher.end(); String group = matcher.group(); int groupCount = matcher.groupCount(); String replaceAll = matcher.replaceAll("shiruo.hdp"); System.out.println("rs=" + rs); System.out.println("look=" + look); System.out.println("find=" + find); System.out.println("start=" + start); System.out.println("end=" + end); System.out.println("group=" + group); System.out.println("groupCount=" + groupCount); System.out.println("replaceAll=" + replaceAll); }

一個或多個漢字：^[\u0391-\uFFE5]+$
郵政編碼：^[1-9]\d{5}$
QQ號碼：^[1-9]\d{4,10}$
郵箱：^[a-zA-Z]{1,}[0-9]{0,}@(([a-zA-z0-9]-*){1,}.){1,3}[a-zA-z-]{1,}$
用戶名（字母開頭 + 數字/字母/下划線）：^[A-Za-z][A-Za-z1-9-]+$
手機號碼：^1[3|4|5|8][0-9]\d{8}$
URL：^((http|https)://)?([\w-]+.)+[\w-]+(/[\w-./?%&=]*)?$
18位身份證號：^(\d{6})(18|19|20)?(\d{2})([01]\d)([0123]\d)(\d{3})(\d|X|x)?$